Holy Grail War

The Holy Grail War (聖杯戦争, Seihai Sensō?) is a competition that decides the ownership of the Holy Grail through intense battle royale. While there have been many conflicts over supposed Holy Grails in the past, this term refers to those specifically based around Masters, usually proficient magi, summoning Servants, Heroic Spirits brought forth as familiars, and meeting in battle until only one pair is left to claim the Holy Grail.

Shinjuku: The Holy Grail War in the original setting of Fate/Apocrypha takes place in Shinjuku. The one of Apocrypha is noted to be the Fifth Holy Grail War, and that Shinjuku is not the ordinary location. It is also abnormal in that fourteen Servants, rather than seven, are summoned. It is unknown if it has any connection to the Fuyuki System. It was later changed to Trifas in the novel version.